Mexico has about thirty ethnic groups with indigenous languages and customs. In the 1990 census were listed a little less than 100 indigenous languages or dialects throughout the territory. It is the criterion of the language that the authorities retain to highlight the existence of an Indian population thus, with regard to this only element one finds an Indian population estimated at 10%. But, an Indian is only one who claims the practice of his language and wears his traditional clothes. Dressed in Western style and evolving in an urban context, an Amerindian, whoever he is, blends into the crowd and becomes a Mexican like any other. The categories "Indian" and "indigenous" were imposed from outside in order to politically, socially and economically marginalize these men and women defeated during the Spanish conquest. The Indian world is actually very heterogeneous and its territorial distribution remains very eclectic. Some